21679756

素因数分解:

$2^2\times 7^2\times {\mathrm{53}}^1\times {\mathrm{2087}}^1$

素因数の和:2158

約数の個数: 36

約数和(自身を含む): 44988048

約数和(自身を除く): 23308292

約数列:

[1, 2, 4, 7, 14, 28, 49, 53, 98, 106, 196, 212, 371, 742, 1484, 2087, 2597, 4174, 5194, 8348, 10388, 14609, 29218, 58436, 102263, 110611, 204526, 221222, 409052, 442444, 774277, 1548554, 3097108, 5419939, 10839878, 21679756]

約数ペア:

[(1, 21679756), (2, 10839878), (4, 5419939), (7, 3097108), (14, 1548554), (28, 774277), (49, 442444), (53, 409052), (98, 221222), (106, 204526), (196, 110611), (212, 102263), (371, 58436), (742, 29218), (1484, 14609), (2087, 10388), (2597, 8348), (4174, 5194)]